docs(readme): update command-line arguments section

README.md

@@ -38,10 +38,18 @@ dotnet tool uninstall --global vertiq.btool
 
 ## Usage
 
+Running `b` without any parameters will locate and execute the build script in its default mode.
+
 ```shell
 b
 ```
 
+All command-line arguments are passed to the build script.
+
+```shell
+b --configuration=Release --platform=x64
+```
+
 ## Contributing
 
 Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.